Mexico's Ministry of Health issued a travel warning advising citizens traveling to the United States to take precautions against measles.

When the local hospital warned of a brewing measles outbreak, Kaleigh Brantner urged fellow residents of this rural West Texas community to beware of vaccinating their children. Two weeks later, her unvaccinated 7-year-old son came home from school with a fever.

A Texas doctor warned people not to attend "measles parties" after the virus infected more than 100 West Texas residents over the past few weeks. Newsweek reached out to the Texas Department of State Health Services (DSHS) for comment via email.

Measles has been spreading across the U.S. for the last several weeks, sickening people in at least nine states amid a growing outbreak in western Texas. Several people have been hospitalized and at least one unvaccinated school-aged child in Texas has died,

Robert F. Kennedy Jr., secretary of the Department of Health and Human Services (HHS), said the measles outbreak in west Texas is a “call to action” as he encouraged parents to consider whether to get their children vaccinated.